Video shows a bison completely unfazed by Old Faithful geyser eruption at Yellowstone National Park. Screengrab from Storyful A stoic bison didn’t care at all that an iconic geyser was exploding ...

BILLINGS, Mont. — A surprise eruption of steam in a Yellowstone National Park geyser basin that sent people scrambling for safety as basketball-sized rocks flew overhead has highlighted a little-known ...

Some, like the famous Old Faithful, erupt like clockwork and are well understood by the scientists who monitor the park's seismic activity. But the type of explosion that happened this week is less ...

BILLINGS, Mont. (AP) — A surprise eruption of steam in a Yellowstone National Park geyser basin that sent people scrambling for safety as basketball-sized rocks flew overhead has highlighted a ...